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Lösung 2.3:1c

Aus Online Mathematik Brückenkurs 1

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As always when completing the square, we focus on the quadratic and linear terms 2xx2, which we also can write as (x22x). If we neglect the minus sign, we can complete square of the expression 2xx2 by using the formula

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and we obtain

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This means that

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A quick check shows that we have completed the square correctly

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